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PDF AD7980 Data sheet ( Hoja de datos )
| Número de pieza | AD7980 | |
| Descripción | 1 MSPS PulSAR ADC | |
| Fabricantes | Analog Devices | |
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Data Sheet
16-Bit, 1 MSPS, PulSAR ADC in MSOP/LFCSP
AD7980
FEATURES
16-bit resolution with no missing codes
Throughput: 1 MSPS
Low power dissipation
4 mW at 1 MSPS (VDD only)
7 mW at 1 MSPS (total)
70 μW at 10 kSPS
INL: ±0.6 LSB typical, ±1.25 LSB maximum
SINAD: 91.25 dB at 10 kHz
THD: −110 dB at 10 kHz
Pseudo differential analog input range
0 V to VREF with VREF between 2.5 V to 5 V
No pipeline delay
Single-supply 2.5 V operation with 1.8 V/2.5 V/3 V/5 V
logic interface
Proprietary serial interface
SPI/QSPI/MICROWIRE™/DSP compatible
Daisy-chain multiple ADCs and busy indicator
10-lead MSOP and 10-lead, 3 mm × 3 mm LFCSP,
same space as SOT-23
Wide operating temperature range: −40°C to +125°C
APPLICATIONS
Battery-powered equipment
Communications
Automatic test equipment (ATE)
Data acquisitions
Medical instruments
Table 1. MSOP, LFCSP 14-/16-/18-Bit PulSAR® ADCs
Type
100 kSPS
250 kSPS
18-Bit
AD7989-11
AD76911
16-Bit
14-Bit
AD7680
AD7683
AD7684
AD7988-11
AD7940
1 Pin-for-pin compatible.
AD76851
AD76871
AD7694
AD79421
TYPICAL APPLICATION CIRCUIT
2.5V TO 5V 2.5V
0 TO VREF
REF VDD VIO
IN+
SDI
AD7980 SCK
IN– SDO
GND
CNV
1.8V TO 5.0V
3- OR 4-WIRE INTERFACE
(SPI, DAISY CHAIN, CS)
Figure 1.
GENERAL DESCRIPTION
The AD79801 is a 16-bit, successive approximation, analog-to-
digital converter (ADC) that operates from a single power supply,
VDD. It contains a low power, high speed, 16-bit sampling ADC
and a versatile serial interface port. On the CNV rising edge, it
samples an analog input, IN+, between 0 V to REF with respect
to a ground sense, IN−. The reference voltage, REF, is applied
externally and can be set independent of the supply voltage,
VDD. Its power scales linearly with throughput.
The SPI-compatible serial interface also features the ability,
using the SDI input, to daisy-chain several ADCs on a single,
3-wire bus and provides an optional busy indicator. It is compatible
with 1.8 V, 2.5 V, 3 V, or 5 V logic, using the separate supply VIO.
The AD7980 is housed in a 10-lead MSOP or a 10-lead LFCSP
with operation specified from −40°C to +125°C.
1 Protected by U.S. Patent 6,703,961.
400 kSPS to 500 kSPS
AD76901
AD7989-51
AD76861
AD76881
AD76931
AD7988-51
AD79461
≥1000 kSPS
AD79821
AD79841
AD79801
AD79831
Rev. E
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2007–2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
1 page  
AD7980
Data Sheet
VDD = 2.5 V, VIO = 1.71 V to 5.5 V, VREF = 5 V, TA = −40°C to +125°C, unless otherwise noted.
Table 3.
Parameter
REFERENCE
Voltage Range
Load Current
SAMPLING DYNAMICS
−3 dB Input Bandwidth
Aperture Delay
DIGITAL INPUTS
Logic Levels
VIL
VIH
VIL
VIH
IIL
IIH
DIGITAL OUTPUTS
Data Format
Pipeline Delay
VOL
VOH
POWER SUPPLIES
VDD
VIO
Standby Current1, 2
Power Dissipation
Total
VDD Only
REF Only
VIO Only
Energy per Conversion
TEMPERATURE RANGE3
Specified Performance
Test Conditions/Comments
1 MSPS, REF = 5 V
VDD = 2.5 V
Min
2.4
Typ Max
5.1
330
10
2.0
VIO > 3V
VIO > 3V
VIO ≤ 3V
VIO ≤ 3V
–0.3
0.7 × VIO
–0.3
0.9 × VIO
−1
−1
0.3 × VIO
VIO + 0.3
0.1 × VIO
VIO + 0.3
+1
+1
ISINK = 500 µA
ISOURCE = −500 µA
Serial 16 bits straight binary
Conversion results available immediately
after completed conversion
0.4
VIO − 0.3
VDD and VIO = 2.5 V, 25°C
VDD = 2.625 V, VREF = 5 V, VIO = 3 V
10 kSPS throughput
1 MSPS throughput, B grade
1 MSPS throughput, A grade
2.375
1.71
2.5 2.625
5.5
0.35
70
7.0 9.0
7.0 10
4
1.7
1.3
7.0
TMIN to TMAX
−40
+125
1 With all digital inputs forced to VIO or GND as required.
2 During the acquisition phase.
3 Contact sales for extended temperature range.
Unit
V
µA
MHz
ns
V
V
µA
µA
µA
V
V
V
V
μA
µW
mW
mW
mW
mW
mW
nJ/sample
°C
Rev. E | Page 4 of 26
5 Page 
AD7980
TYPICAL PERFORMANCE CHARACTERISTICS
VDD = 2.5 V, VREF = 5.0 V, VIO = 3.3 V, unless otherwise noted.
1.25
1.00
POSITIVE INL: +0.33 LSB
NEGATIVE INL: –0.39 LSB
0.75
0.50
0.25
0
–0.25
–0.50
–0.75
–1.00
–1.25
0
16384
32768
49152
CODE
Figure 6. Integral Nonlinearity vs. Code, REF = 5 V
65536
1.25
POSITIVE INL: +0.47 LSB
1.00 NEGATIVE INL: –0.26 LSB
0.75
0.50
0.25
0
–0.25
–0.50
–0.75
–1.00
–1.25
0
16384
32768
49152
CODE
Figure 7. Integral Nonlinearity vs. Code, REF = 2.5 V
65536
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0
ffSIN==110MkSHPzS
SNR = 91.27dB
THD = –114.63dB
SFDR = 110.10dB
SINAD = 91.25dB
100 200 300
FREQUENCY (kHz)
Figure 8. FFT Plot, REF = 5 V
400
500
Data Sheet
1.00
0.75
POSITIVE INL: +0.18 LSB
NEGATIVE INL: –0.21 LSB
0.50
0.25
0
–0.25
–0.50
–0.75
–1.00
0
16384
32768
49152
65536
CODE
Figure 9. Differential Nonlinearity vs. Code, REF = 5 V
1.00
POSITIVE INL: +0.25 LSB
NEGATIVE INL: –0.22 LSB
0.75
0.50
0.25
0
–0.25
–0.50
–0.75
–1.00
0
16384
32768
49152
65536
CODE
Figure 10. Differential Nonlinearity vs. Code, REF = 2.5 V
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0
ffSIN==110MkSHPzS
SNR = 86.8dB
THD = –111.4dB
SFDR = 105.9dB
SINAD = 86.8dB
100 200 300
FREQUENCY (kHz)
Figure 11. FFT Plot, REF = 2.5 V
400
500
Rev. E | Page 10 of 26
11 Page | ||
| Páginas | Total 27 Páginas | |
| PDF Descargar | [ Datasheet AD7980.PDF ] | |
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